TRADE RECEIVABLES (Tables)

12 Months Ended

Dec. 31, 2023

Trade Receivables

Schedule of trade receivables

	December 31,
	2022			2023		2023
	CNY			CNY		US$
Non-current
Trade receivables from construction contracts		13,128			—		—
Less: Impairment allowance		(2,608	)		—		—
Total of Non-current trade receivables		10,520			—		—
Current
Trade receivables from service concession agreement		22,927			—		—
Trade receivables from construction contracts		34,850			—		—
Less: Impairment allowance		(11,017	)		—		—
Total of current trade receivables		46,760			—		—
Total		57,280			—		—

Schedule of aging analysis of trade receivables

	December 31,
	2022		2023		2023
	CNY		CNY		US$
Within 1 year		18,401		—		—
Between 1-2 years		13,896		—		—
Between 2-3 years		4,518		—		—
Over 3 years		20,465		—		—
Total		57,280		—		—

Schedule of the movement in the loss allowance for trade receivables

	December 31,
	2022			2023			2023
	CNY			CNY			US$
Beginning of the year		17,614			13,625			1,925
(Reversal)/provision for expected credit losses, net		(3,989	)		383			54
Disposal of PSTT		—			(14,008	)		(1,979	)
End of the year		13,625			—			—

Schedule of impairment

	Past due
	Current	Within 1 year		1-2 years		2-3 years		Over 3 years		Total
As of December 31, 2021:
Expected credit loss rate:	—	6	%	26	%	13	%	48	%	26	%
Gross carrying amount (CNY)	3,670	16,311		6,865		14,712		27,083		68,641
Impairment allowances (CNY)	—	955		1,759		1,916	(i)	12,984	(ii)	17,614
As of December 31, 2022:
Expected credit loss rate:	—	0	%	9	%	29	%	34	%	19	%
Gross carrying amount (CNY)	—	18,406		15,195		6,399		30,905		70,905
Impairment allowances (CNY)	—	5		1,299		1,881		10,440	(ii)	13,625

(i) The impairment allowances included CNY221 as of December 31, 2021, for specific trade receivables which were considered to be in default due to conditions which indicated that the Group was unlikely to receive the outstanding contractual amounts in full.

(ii) The impairment allowances included an amount of CNY4,600 and nil as of December 31, 2022 for specific trade receivables which were considered to be in default due to conditions which indicated that the Group was unlikely to receive the outstanding contractual amounts in full.